光子晶体光纤中基于受激布里渊散射实现快光的数值模拟研究

为了了解基于光纤受激布里渊散射快光传输系统的一些外在因素对受激布里渊散射快光传输的影响,对该传输过程进行了研究。首先,根据受激布里渊散射过程的"三波耦合方程"进行了理论改进,然后选定了3种光子晶体光纤作为传输介质,通过对比,选出一种光子晶体光纤RB65进行具体分析研究。通过求解"三波耦合方程",对快光受激布里渊散射过程进行了模拟分析,探讨了光纤长度、探测信号脉冲宽度和输入信号功率对传输的影响。结果表明,在保证信号失真相对较小的情况下,取40 m长度光纤、140 ns信号脉宽和174 m W输入信号功率时的快光提前效率最高。

Numerical Simulation of The Realization of Fast Light Based on Stimulated Scattering in Photonic Crystal Fiber

In order to understand the influence of some external factors on the fast light transmission system of stimulated Brillouin scattering, the transmission process was studied. Firstly, according to the ‘Three wave coupling equation’ , three kinds of photonic crystal fibers were selected. Then, a new type of photonic crystal fiber was selected. Through the comparison, a new type of photonic crystal fiber RB65 was selected. The results show that the fractional advancement of the fast light is the highest with the fiber length of 40 m, signal pulse width of 140 ns, and input signal power of 174 mW when the signal distortion is relatively small.